/*
   * Simplefb device tree support
   *
   * (C) Copyright 2015
   * Stephen Warren <swarren@wwwdotorg.org>
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #include <common.h>

  #include <dm.h>

  #include <lcd.h>
  #include <fdt_support.h>

  #include <linux/libfdt.h>

  #include <video.h>

  
  DECLARE_GLOBAL_DATA_PTR;
  
  static int lcd_dt_simplefb_configure_node(void *blob, int off)
  {

  	int xsize, ysize;
  	int bpix; /* log2 of bits per pixel */
  	const char *name;
  	ulong fb_base;

  #ifdef CONFIG_DM_VIDEO
  	struct video_uc_platdata *plat;
  	struct video_priv *uc_priv;
  	struct udevice *dev;
  	int ret;

  	ret = uclass_first_device_err(UCLASS_VIDEO, &dev);
  	if (ret)
  		return ret;
  	uc_priv = dev_get_uclass_priv(dev);
  	plat = dev_get_uclass_platdata(dev);
  	xsize = uc_priv->xsize;
  	ysize = uc_priv->ysize;
  	bpix = uc_priv->bpix;
  	fb_base = plat->base;
  #else

  	xsize = lcd_get_pixel_width();
  	ysize = lcd_get_pixel_height();
  	bpix = LCD_BPP;
  	fb_base = gd->fb_base;

  #endif

  	switch (bpix) {
  	case 4: /* VIDEO_BPP16 */
  		name = "r5g6b5";
  		break;
  	case 5: /* VIDEO_BPP32 */
  		name = "a8r8g8b8";
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	return fdt_setup_simplefb_node(blob, off, fb_base, xsize, ysize,
  				       xsize * (1 << bpix) / 8, name);

  }
  
  int lcd_dt_simplefb_add_node(void *blob)
  {
  	static const char compat[] = "simple-framebuffer";
  	static const char disabled[] = "disabled";
  	int off, ret;
  
  	off = fdt_add_subnode(blob, 0, "framebuffer");
  	if (off < 0)
  		return -1;
  
  	ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled));
  	if (ret < 0)
  		return -1;
  
  	ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat));
  	if (ret < 0)
  		return -1;
  
  	return lcd_dt_simplefb_configure_node(blob, off);
  }
  
  int lcd_dt_simplefb_enable_existing_node(void *blob)
  {
  	int off;
  
  	off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
  	if (off < 0)
  		return -1;
  
  	return lcd_dt_simplefb_configure_node(blob, off);
  }